@article{TIMM_2011_17_4_a1,
     author = {V. A. Belonogov},
     title = {Small interactions in the groups $\mathrm{Sp}_4(q)$ for even~$q$},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {19--37},
     year = {2011},
     volume = {17},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2011_17_4_a1/}
}